Staying with the theme of Earth in Space, decide on how the content can be gathered around questions.
- Why is the Earth Round?
- Why do Earthquakes happen?
- Why aren’t rocks all the same?
- Do mountains get bigger or smaller with age?
- Can we tell the history of the Earth from studying the rocks?
The next step is to check you have a question that covers each of the areas you need to investigate. Try dividing the content up between these questions. By a process of trial and error you will end up with a set of these questions each with some required content attached.